Magnetic induction machine



Dec. 6, 1932. E. WHITE MAGNETIC INDUCTION MACHINE Filed July 28, 1950 4Sheets-Sheet l FIQ. 3

INVENTOR 14 MW TE ATTORNEY 7 Dec. 6, 1932. E. WHITE MAGNETIC INDUCTIONMACHINE Filed July 28, 1950 4 Sheets-Sheet 2 75 Ground INVENTOR ill )4?rt m z ATTORNEY L LE Dec. 6, 1932.

E. WHITE 1,890,104

MAGNETIC INDUCTION MACHINE Filed July 28, 1930 4 Sheets-Sheet 3 LNVENTORATTORNEY Dec. 6, 1932. 5, m 1,890,104

MAGNETIC INDUCTION MACHINE FiledJuly 28, 1950 4 Sheets-Sheet 4 INVENTOR.fl/ /rf ATTORNEY i ter Dec 6; 193251 ATENT OFFICE ELI warm; or DETROIT,menial m f 1 statistic inn-neutron MACHINE s amrmeuui zs, 1930. SerialNo. 471,173.

' This invention relates tomagnetic induc tion machines and the objectis to provide parts.

Another object is to provide a magnetic induction machine of; a new andsimplified construction eliminat ng the USeIOf collector ringsand'brushes, and itis further anob ect v of the invention to soconstruct the machine, 9 asto practically eliminate lossesfromhyster-esis. i t An'additional object of the invention is to wprovides; magnetic induction machine fundamentally. adapted for directlygenerating '1 alternating current and that i yf means *of a commutatoriand brushes ashereinafter described, be utilized to generate directcurrent.

Itlis further sabbjea ofthe invention to 2 wprovide a magneticinductionmachine of simplified construction for; generating alternatingelectric current in which the? generating unitsmay begembodied inamanner to provide alternatinggcurrent of one-- ,two or n threephases.and further one in which the voltage the generated currentmay be varied.

- 'An additional object theinventionis to provide amagnetic induction;machine which may actas a s1ng1e,.double O l Phase. 2 i generator andfurther one in which aseries of the generating units maybeutilizedleachof which may be utilized" to .deliver current to its own load lineindependently of'the 5 others.

An additional obj ect. and feature the inventionis to provide a magneticinduction machine of a simplified construction having no moving coilsandrso a'rrangedthat the f 4 magnetism Hcausingrotation mayact on thecircumference of a rotorsoflarge diameter thus providing a-imotor ofpowerfultorque. More specifically the object of the invention lis'ytoprovide an electrical device consisting P of a rotorhaving a series ofspaced segments ofmagnetic material and one or more magnets, he1'enafte1"-.termed surge units, preferably ofa four-pole type,two of whichare northpole andtwo of which are south pole,

'nately through the two pairs ofpole pieces cession with the segmentssoarranged that p v wvlien one pair of pole pieces are covered by such amach ne having no coils on the moving the lines of force generatedby thefield coil pass through the segment from one pole piece or arm'to theother. The only magnetic lines that will pass through the opposite pairof pole pieces will be such as can pass through the air gap between thefaces of the pole pieces which are spaced a considerable distance apartwhereby the magnetic lines of force passing through the latter magneticcircuit will be relatively small as compared with those passing throughthe first mentioned magnet c circuit. k 7 By rotation of the rotor themagnetic segment leaves the first mentioned pole pieces anda succeedingair space comes opposite the same asthe magnetic material moves into thespace between the second set ofpole pieces. Thus,- the magnetic lines offorce are caused to surge through the last two pole pieces and to leavethe first two. By continuous rotation of the rotor therefor-cit will beseen that there is a continuous surge alterof the surge unit and currentmay be taken off through the surge coilsthe voltage of which isproportional to the speed of the rotor and to the net number of lines offorce F transferred fromone pair ofpole pieces-t0 the opposite andthusanalternating current is. generated which can be delivered to theload line in the usual manner.

The aforesaid objects and novel features of the inventionare hereinaftermore fully described'and cla med, and the preferred form of constructionof an electric generator or niotorembodying my invention isshown in theaccompanying drawings which are more or less diagrammatic in characterand in which-- "Fig. 1 is a se ction taken on line BB of Fig 2, showng'a part of the rotor and magt g t p I not orisurge unit.

. between which these segments move in suc;

Fig. 2 is a sectional View taken on line AA of Fig. 1 showing therelationship of.

nected in series and shows the connection to,

the brushes illustrating how' a direct current can be taken therefrom.

onerotor'segment.

1 :Fig. 8 is a'diagram showing the generating coils connected to provide.fourciruits'one circuit foreachrgenerating coil and having the centerleads grounded. r Fig. 9 shows the generating coils connected inparallel under which condition the total the voltage of asingle coil 7voltage .of the generated current is equal .to

and the amperage is equal to the sum of the. amperes generated I V bythefour coils.

Fig. 10 is a diagram showing four generatlngcoils arranged for three wre connections each pair of 0011s being connectedm series thus'giving avoltage equal to the comof connectin Fig. 13 is asimilar view of analternative form of magnet by means of netic circuit is shortened.- T IFig. .14 is an alternative form of construction 'in'which there are aplurality of rotors with a common axis having surge units pr0-' binedvoltageof two coils. The neutral or I groundwire is taken 01f. from theconnection "between the two pairs of coils.

Fig. 11 is a diagram showing one method.

g the surge coils when used'as a motor.'

' Fig-12 isa view similar to Fig. 3 showing the use of .a plurality ofmagnets or surge units in conjunction with :the rotor only a portion'ofwhichiis shown.

which the magvided withthree' or more same axialplane...

Fig."l 5 is a half planview and'half sec tional view showing thearrangement of the surge unit interiorly'of the rotor instead polepieces in the i of exteriorly thereof in which one central fieldmagnet-operates all-the surge units. An

alternative form of rotor segments are shown on this view in which theends of therotor segments are formed by radial planes. I

' Fig. 16 is'a section of the machine taken The generalprinciple of themachine is illustrated in its simplest form in Fig. 1 in i which-aportion of therotor indicated at R is shownin itsgeneral relation with am agnet 'M. It is to be understoodfthat the rotor R is mounted to berevolved; by approved a portion of the" erablyof steel.

1 are of equal size the commutator includinga wiring diagram for themachine in which thecoils are conpieces S and S'1 are on the 'bodyM,one'of which is shown at 10 in means when used as a generator and is acoinplete circlein form. The rotor consists of the two bands, theexternal band R-l and the internal band R'2 which may be of brass,aluminum or other non-magnetic material. These bands support themagnetic segments T, T1 and T.3 which are pref- These magnetic segmentsand are equally spaced around the rotor leaving spaces between ofapproximatelylequal. size and form and the spaces betweenthe magneticelements are either air spaces'or arefilled with a non-magj 'neticmaterial or in. some mannerclosed as Fig. 7 is a similar view with thecommute tor turned a distance equal to the length of The purpose of thusfilling or enclosing the,

spaces b etween theelements T, T1 etc., is to reducethe air resistanceto rotation. The

.85 "segments. T, T.1 etc., are preferably of sheets of metal orlamination's andof a form such as'shown at 2 in Fig. 2 which is a crosssection of the rotor through one of they segments. It will there belseenthat its opposite faces are grooved and that the oppositely disposedpole pieces of the magnet or surge unitfM are likewise grooved, thepurpose being to'reduce thereluctanceof'the air path between the polefaces and the rotor seg- .mentsdue' to the'l'arger area oflered totheflow "of magnetic lines of force.

A'second purposeof the grooves or ser- 7 rations is to offer alargerperimeter to the lines of force passing in a. tangential dlrec- .tionbetweenthe rotor and'the radial-surface of the :poles, this being;especially efiicient when the machine is operated as a motor. Suchgrooves or serrations are not absolutely essential. as the pole facesand the magnetic elements T of the rotor may have plane faces in closeproximity to each other. The pole faces are also shown muchlargerinareathan the'cross section'of the surge arms inorder to still further reducethe reluctance of the airpath between the pole faces and the rotorsegmentsf. f a

The surge unit is of peculiar form, it consisting 'ofthe body portionshown at M in cross section in Fig. 1 and in elevation in Fig.

2 and from one end of this body'extends two arms 11,1lhaving pole facesN and N1 on one side of the rotor while the opposite pole the oppositeend of Fig. 2. The pole pieces S and S-.-1 are ina directly opposedrelation to the pole pieces N and N -1 respectively. Two such polepieces 'N-l and S.-1 are shown in Fig. 2. Thus, poles, two north polethis magnetuhas four pieces and twosouth pole pieces in opposed relationand the magnetic elements T, T-1

etc, of the rotor'ipass between these pole vpieces successively astherotor is rotated. The elements T,-. T -1 and.T.3 etc., of the rotorare exactly alike; construction and -liave the forwardandrearedgescurved in form toward the direction of rotation of the rotor asindicated by the arrowin Fig. 1. 'The object oft-he curvature of theends of the segments is. three-told; first, it is necessary in ordertodivide thepole faces diagonally 1 into two equal areas; second, byvarying this 'thepossibilityof a dead centerlposition for curvature, thecurve ofthe generated voltage may bevaried; and third, it does away withthe rotor when usedas agmotor as will be described later i A rotorsegment ends formed by radialspl anes, as shownin Fig.r15., may be inwhichcase the voltage generated will be nearly uniform inintensity: Thisform of segment would be especially" advantageous where the machine isused to generate direct current as the intensity ofthe voltage gen--erated--.would be IIlOI'JlIllfOI'Hi than with "segments having curvedends. a

The arr ement fthei curved rotor seginents (see Fig. 1.) is suchthat asthe element T for instance passes betweentwo of the pole pieces, one ofwhichis shown at;N in Fig. 1

and which: will be understoodas being opposed'i by pole pieces S of theopposite end of the magnet, the form of curveissuch that when the 'outerend is oppositethe left hand corner of a pole face the inner end of thecurve will be opposite the inner right hand corner of-the pole face asshown inFigul which thus serves to divide the pole faces jinto twoequal, areas and thus withthe magnetic flux of the poles Nand Sdecreasing wdue'to the turning of the rotor the'magnetic flux "isincreased between theother pole pieces N-' 1uand1 S-l of the samemagnet, and it-willfurther be .notedthat, due to the vtact thatthesesegmentsare spaced apart by aniarea of prac Ltically the same area andcontour as each i segment, when a rotorelement T passes from theposition shown 1 soithat the rear curved face. occupies the sameposition relative to:.the pole pieces 'N- 1 and S 1 as it does occupyrelativeto the pole pieces N and S in said Fig. 1, the nextsucceedingsegment l 3 is passing in "between the pole pieces NandS'... ad It isto be noted that the segments and surface contour are so"designed that'the total area of the segment in a plane parallel with vthe pole faces andimmediately opposite said 55.

pole faces'is always constant and equal to the total area of one poleface. By this arrangement the total fluxthrough the field coil is:constant and counter electro-motive force inthe field .coil isprevented. The magjnetic path isthus increased and decreased in eachpair of polesof the magnets in succession aIlCl'tlHS tends to cause a:surge of the magnetic lines of force first through the. one pain-ofpole pieces and then through the i wo hera; The InagnetMis preferablyprovided with a field coil F connected with an exciter or other sourceof direct current and the portions 10, and 11, 11 of the magnet areprovided with what I have termed surge coils,

the two arms 11 carrying the north pole' pieces having the coils thereofconnected together, as shown in Fig. 1, while those coils GS and GS-1 ofthe south pole pieces are connected together having the terminals L- 3and L4 and these may be connected 5 to an outgoing supply line for thedelivery of electric current to a distance. may be connected in parallelor in series or the coil of each surge unit may be connected These coilsto its own load line. 1 'When the coils are connested in parallel thevoltage is that of one coil. When they are connected in series thevoltage is that of the combined coils.

The basic principle of the invention is illustrated in Figs. 1, 2 and 3from which it will be seen that the magnetic lines of force are causedto traverse a magnetic circuit through shown and described in Fig. 1while Fig. 13

shows a unit iaving a form of pole pieces wlth a SllOltGllllflgIlGtlCcircuit. The fundamental operation however, 1s identical in either ofthese cases in the generation of an alternating current and due to theposition of the magnets and the fact that more than one generating unitcan be utilized in connection with the same rotor alternating currentsof one or more phases may be produced depending on the arrangement ofthe surge units with relation to the rotor segments. As

shown in Fig. 14 the rotor may have a plu 'rality of rings carryingmagnetic segments all connected with a single shaft by the arms X. Insuch case the units U-2, U8 and ,U4 are formed with pole pieces between.these separate rings and the revolution of the shaft causes these ringsand their segments to revolve between successlve groups of pole pieces'By the arrangement shown in Fig.

lathe current output may be increased in proportion to the number ofrotors added to the shaft.

' Instead of the surge units being external theyv may be arrangedinternally as shown in Figs. 15 and 16 in which case there is only onemagnet M1 with a series of arms 0 extending therefrom providing thenorth pole pieces and'similar arms P extending from the, opposite end ofmagnet M-..-1 forming the south pole pieces and the pole pieces and therotor of this construction are alike in their relationship and aresimilar to those shown in Fig. 1, heretofore described, andthis' magnetalso has the field coil F and the several coils'GN, GN1, GS and GS-Elfor the relative north and south pole pieces. It is to be understoodthat the rotors in each of. the. cases cited are supported by a shaft,one arrangement of which is shown in Figs. and 16, towhich power may beapplied in rotating .the rotor and that the magnets are stationarywhilethe rotor is revolved. It willbe understood that in any of the forms ofthe invention 'hereinshown, the magnetic fluxsur es alternatel from one3a1r of )ole plecesto a second palr of pole pieces whereby current isgenerated in the several coils wound on these pole pieces.

" The speed ofrotation of the rotor, due to the arrangementof partsdescribed, determines the voltage and when usedas'an alter 1 natingcurrent generator,:no commutator or collect'or rings or brushes arerequired and also that the polarityof .the poles never changes andthatthe total combined flux through the two sets ofpolepieces and hence 7through the field coil F remains approxiunately constant, and thattherei'is only a magnetic surge increasing or decrea'sing the relativenumber of llnesof force in the pole pieces without reversing. thepolarlty and 'that the invention may be'arranged to generate alternatingcurrents of] one; two or three phases. This latter feature isbestillustrated, in Fig.12 which shows thethree surge units U-Q, U+3 and U54so arranged with relationto the rotor R that the currentgen- .erated bythe'segment T is one-third of a .wave length in advance of thatgenerated at the same instant by the-segment T l. I With "thisarrangementof the several units a threefphase currentmay be generatedand by increasing. the space between the units U2,

and U--t the machine may be arrange togener'ate a two-phasecurrent.

- r-Severalj objects and advantages; are attained by thisinvention, Therotor is con-- .structed entirely or metaliand has no con- .ductors'onit and hence it is much simpler to with such devices.

balance and iszless'costly to .manufacture.

. The generating units 7 are so constructed that I there is-never anyreversal of magnetism thus greatly reducing losses from hysteresis.

The machine may be operated for producing alternatlng current WltllOLltany commutator, collector'rings or brushes thus avoiding expense andoperating losses associated The machlne may be quickly changed togenerate one, two or three? phase current'by simply varyingthe respeci.tive'positions of the several units. The gen erated voltage for thesamespeed' of revolution maybe varied according astowhether :thecoilsare connected singly,or inseries,

f wlththe formshown inFigs. and 2 this ,Voltag'emay be varied 400 percents By using new coils.

' duced to never be as great as the ampere turnson the This is due tothefactthat when the ampere turns on thesurge coil approaches that on thehold coilthe magnetism'in the surge arm is rezero and ;no current can begenerated.

rent may be enerated and how a plurality ot-circuits may be provided andvoltage'varied and the structure utilizedas a motor.

Fig.6 shows a wiring diagram arranged In'Figs; 6 to 11 I have shown aseriesof. :Wiring diagrams to illustrate how direct cur-' coilmultiplied by-the number of turns of the it generating COll (known asampere turns) can for generation of direct current. The dia gram showsthez'four generating coils connected in series with a neutral wire takenoff from the connection 3o1n1ng GN-l and GN,

thisne'utral wire being carried to the ground,

and also formingone side of the line. 'The two outer wires connecting toG 1 and GS arcarriedto brushes B-l' man-2. This figure shows the centerbrushB-B bearing onthe segment which connects to ring 'C1,

andthence to brush B1. In thisposition cu rrentwill flow fromcoil GSthrough brush B,1' into ring C l,thence into brush B3 ,andout onto lineL2; va working current abeing'taken olfbetween' lines L1 and L -2.

l/Vh'en the rotor'has turned through adistance equal to the length ofone segment,

position as shownin F .7. v In thisposition,

the currentwill then-come fromgenerating coil GS 1, pass'to brush 13-2,thenceto ring C 2" and out onto brush 13-3, and thence to line L-2. I

It will be noted the use of this connection that the generating coilsare only con- ;nected to thejline one hall of the time. In other words,"only'at su clrtime as the'current would be passing in a positivedirection out into lin.e-L2.

' Fig. .8 shows the :four coils. connected separatelywhenno commutatoris used, in which case four distinct circuits could be employed 'totakethe current generated by the coils.

Fig. 9 shows the coils connected inparallel without the use. of anycommutator, in which case the center connections of the four coils aregrounded. With this formofconnection,

:unless the curve of the alternating current 1 generatedby all fourco ls1s 1n exact synchron1sm,"there would be a loss of current, a-s

brushes B'1, B12 and B3 will then be in p current gener wiresystemfof'wiringq method, the voltage is equal to the yoltagegeneratedon each pairfof surge coil q 1 1 '1' ,Withrefejrence to operation ofthemachine as LaQmOtQI thls can be accompl shed in sevmotor by feedingcurrent to lines 'L-1"a-l1d.

ingno current passing through a coils and GS-"l; f 3 The magnetism inthese coils i will cause the rotorjto move the lengthof one segment toapositiondirectlybetween pole ieces of GN "a niiLGrS ,at fhich timebrush E 3 will then beconnected to ring C2, and

the current will belcut off yfromcoils GN and I length forward"togaposition between these pole pieces and this operation continuesin-- definitelyiwhile curr ntisapplied to lines- 1o Lv-1 andL-QJQ' f Y aa ,Withthesegmentscurved asshownthere is nevera possibility Leta deadcenter for the rdmnysmcethe forward ipull on thefouter' pointofa rotorsegment being on alarg'er radius any backward pull that mightsegmentfrom thej poles which it come to a need the backward. torquejbythe difference portion of,the. current";thew-balance of the "1 currentwould enter the l surge coils alters rrangement of the commntatorlasshown in @Fig; 6, a the current being supplied is {line i Lf1"andliIlBQQIHQ, the center cOnne'c- I tions between "the [coils grounded:as; indie :cated, and fconnected ito line 1 L.1. In this ldicated by,dottedbircles. :-These; are :to be wound on the'fourlsurge arms or polepieces anus and ren-xi,cs+l iespectivelyslso I that apart of the currententering into GN1 and is diyertedtoshuntqjcoil G, which tween thewirewinding and the :iron of the cores iskeptjata minimum; likewise I have"the advantage of saving in copper tor a threeeral differentwayss It canbegoperated as a L-FQ, as shown'in :Figffi, inwhich case coils GN and GSwill be; first, energized, there be- GS and turned ontocjoils GN-1 maosEthus againpulling thelfrotor another segment without the use of acommutator.

H is leaving, causes'the forward torque to -ex-' natel'y fthrough theconnectionsushown as brush} B 1 and brush iBfi2, from theardiagram, theshunt tan G and G4 1 are inis woundonthesurgearmsGN' and GS, pass-Q pullone of the roor segments between them, thus moving the brush to theposition shown in Figure 7 ,when the current would come to the surgecoils through brush 13-2, thence intocoils GN and GS, making the magnetism in these arms of maximum intensity. The current would at the sametime pass through shunt coil G1, thereby repressing or reducing to zerothe magnetism in surge.

arms GN1 andGS l; the combined con- I dition of magnetism in thefoursurge arms then drawing the rotor forward the length ofanother segment.The operation would continue indefinitely whilecurrent was beingsupplied to lines L- l and L 2.

The connection ofsurge'coils, as shown in Figure 9 may be used tooperate the device as; a synchronous alternating current motor V In thiscase a" small amount of direct current would be required to energize thefield coil. The connections are such that when the current passes in onedirection from line L 2 to L1 it will, foriexample, add to the magnetismproduced in poles N and S by the field coils audit will subtract fromthe magnetism in poles N -l and S-1. Then when the cycle is reversedtheopposite result will occurynamelythe intensity of magnetism and thefield magnet, which would tend to i inpoles N- 1 and S 1 will beincreased to v a maximum while the magnetism in pole pieces N and S isdecreased to aminimum.

This sequence of change inintensity will alternately draw the magneticsegments of the-rotor between the intensified pole pieces causingrotation of the rotor until the segments synchronize in their motionwith the cycles of alternating current.

The arrangement of surge units, as shown phase motor. In this case thefield magnets of units U-2,U-3 and would be energizedbya direct currentand an alternating three-phase current would have each separate phaseconnected in succession to units U2 U 3 and U-4 respectively such thatthe alternatingcurrent would add to the magntismproduced by the fieldcoil in-one pair of: pole pieces and subtract from the magnetismproduced in the other pair of pole pieces With the phases connected inproper sequence tothe surge'units there will result a in Fig. '12, isadaptable for use as a three an'intensity of magnetism in one pair ofpole pieces of each unit that will'pull the segments between thepole'pieces thus causing rotation of theirotor. To secure this'resultthemag- I nets are grouped in multiples of three as indi cated in Fig.12 and each have two pairs of I pole piecesin such relation that thedistance ment of magnet having the central b 3dyandv between the pairsof pole faces of each magnet measured circumferentially is one-half thelength of the rotor segment and the distance between the groupsisfive-sixths of thelength of the rotor segment. This arrangement of thepairs and groups applies to the arrangethe radially disposed pole piecesas'well as to the form of magnet shownin Fig. 12. V The advantageofthis' invention when the device is operated as amotor are as follows:

First, the armature is constructed entirely of metal-and has noconductors onit, hence it is 7 much simpler to balance and manufacture;7 second, the surge HDItS'OIJBIHtG onthe outer From the foregoingdescriptioni' iscbelieved evident that the various objects'oftheinvention are attained by the construction andarrangementof the partsdescribed, that .7 is, simplicity of construction in that no coilsareused on movingparts; that loss'from hysteresis is practicallyeliminated, and that the device may be-arrangedto generate alternat' ingcurrent of one, two or three phases and through use ofa commutatormaybeiusedto generate direct current and may also be utilized to act asa mo-torjope rating through use of direct current ,or an alternatingcurrent of one, two or three phases, and further that of slow p iprovided hav n powerful torque.

Y Havingthus fully de'scribed my invention,

what I claim and'desire'to secure byLetters' Patent-of the United Statesis- In a magnetic induction machine,"aimagnetliaving a series of polearms inpairs, a field coil 2 for energizing thesame, a ser es ofgenerating coils, atleast one forfeach ofjthe" pole arms andcompletelyenclosingthejsame,

a'rotor-mcludmg aser'les'ofsegments duced throu hthe surgin ofthe'li'ies or v a t f A net ic material alternating with sections.

approximately equal size non magnetic and; IIOIPCOIldllCtlllg ncharacter positioned be-' tween-the said 'pole arms and throughrotaments-being so'arranged that only one magj netic segment maybeopposite a pairo'fipole netic' section maybe a structure inwhichcontinued rotation ofthe rotor causes a surge of'magnet ic lines offorce first through one set offpolearins and then through the otherthereby generating current a ,7

in the generating coils. i v

2; In a magnetic inductionmachine, a magnet having aplurality of .pairsof pole arms in spaced relation, a field coil associated with the magnetand carrying direct currentto thereby cause flow ofthe magnetic lines offorce continuouslyin one direction through 'netic andnon-magnet-icsectionspass the same- 1n sequence sa d magnet c and non-magnetic"sectionsbeing so arranged that only one magarms 'at' a time.

' a magnetic induction machine, ma nethavm genes of p arm-181mpairswin'radialre'lation with the body of the mag-' net, a field coil forfsaid magnetgiwhich by; energization' causes magnet cl hnes of force topass c0nt1nuous1y 111 one dn'ectionthrough the'pole arms, a rotorconsisting of a ring rotating between the series of pole arms, the

said ring including a seriesofmagnetic'and non-magnetic sectionszofequal size and form 1n alternate relatlon through rotat1on of whichthemagneticlines of iorce are caused to surge ln'thesaid pole-arn1ls,and"a serles of surge coils at least one for each of'the pole armsin'which current is induced by-the said surging, andfa load circuit withwhich the coils are associated. 7' 4, In a magneticinduction machine, arotor opposite a pair of'pole;

consisting of a ring formedoftwo concentric 7 bands of non-magneticmaterial, a series of segments of magneticlrhatrial supported betweenthe bandsin spaced relation whereby the ringconsists ofaseriesofmagnetic and non-magneticsections, a' magnet having two pairsof poe armsinopposed spaced relation 7 between. which the magnetic andnon-magneticsections of thering pass in succession throughirotation ofthe rotor, a field coil for energizing the magnet; and coils ofinsulated wire on theipole; armsilnwhich current-is in:

magnetic force across the pole arm'sand pro ducing antalternat-ingelectric current in eacn' v g or a eneratedcurren fromeah L 19 17 oftias n rmagnetic segment lsopt c Ofthepolls a positeone pair of polearmsa non-magnetic 1 section 18 between a succeeding pa nsaidseg 5; Inacmagnet-icind uction machine, a rotor meludmg a seriesof magnetic andnon-mage resections inalte'rnate relation, both said sections having thesame surface form, the V -magnet 1c sect ons hav ng-the forward and rrear ends for'm'edon-al'curve lnclined toward the directlon whereby theouter end ofthe magnetic section is circumferen- B 1 tially inadvance oftheyinner end of the secj j tion, a magnet consisting of two pairs ofpole varms in spaced relation between which the rotor sections pass,afield coil for energizing the magnet, surge-coilson the said pole arms"wherebvthroughrotation of the rotor the v magnetic lines of force arecaused to surge vI r ng alternat ng current inthe coils, the mag-"1161310 sections being so arranged and spaced 'bythenoam'agnemcsections that the total,

in thepolearms in alternate relation inducarea of magneticjsectionsopposite the pole i 6. In a,1nagnetic induction arms" of thefmagnet iscIns ant the total area ofione pole face.

and equal to e1ecu-ogmagneastator having acommon field portion, polearms thereon providing a plurality I of l 1 separate incompletemagneticv circuits, coil of insulatedwire completely 1 encirclingea'chpolef'arin an. armature there- 1 g for .consisting ofalternatesections ofamag- 'netic and nonemagneticmaterial sorelativelylocated with reference, one to the other T andftojthepole;arms' that movement thereof rrelative thereto willconsecutivelyassist-in "completing andinterrupting, the magnetic flow in fthe'jincomplete magnetic circuits so 1'7. Inarotarymagnetminduction machine,

I "anelectro magnetic stator having a common centraljor fieldiportlomyacoll 0f insulated conducting wire for magnetizing the same,

pairsfof polepieces projecting from said field 1, 1 portion} and forminga plurality of separate and incomplete circuits for magnetic flux, a

f series of coilsfof insulated conducting wire each completelyencirclingeach pole'piece, a i rotor havingalternatejfsectionsof magneticandnon-magnetjic material L approximately equal in size so relativelylocated one to the i other 'and tothestator polepieces thatthroughrevolutionj of 'therotor said alternate sections consecutively iass istflin completmg and interrupting themagneticcircuits of the"separatepairs of polejpieces whereby surges if j of'magneticfiuX arecausedrthrough the pole pieces and coils therefor andthe magnetic fluxthrough the vfieldfportion is maintained practicallyconstant, thepartsbeing so, ar-

1 rangedthat the surges o fmagnetic flux out the coilsofthe p 19]piecesthereby generating V alternating current, landmeajnsfor conductaing currentsep'arately'ffron"Reach coil to a loadline; 1 a

' 8; gInfarotary magnetic induction machine,

' an electr c-magnetic statorhaving a common central fieldportionofmagnetically permei' able material, aseriesofi pole piecesin pairs i.projectingtherefromj' to forma plurality of separate incomplete circuitsforfthe flow of magnetic flux, a series of coils of insulated conductingwire each encircling a pole piece, a rotor formed of alternate sectionsof magnetic and non-magnetic material of approx imately equal size sorelatively located one to the other and to the stator pole pieces thatas an electric current is alternatelydelivered to and cut off from thecoils of the pole pieces, the magnetic sections of the rotor are drawninto" the circuits of the magnetized pole pieces thereby causingrotation of the rotor, the arrangement of the parts providing that themagnetic fluxof the central or field portion ofthestator remainspractically constant;

r In a rotary magneticinductionmachine, machme, an

a central magnetically permeable portion, pole piecesin pairs thereon, aseries of coils of electrically'conducting'wire one on each of the polepieces, a rotor having segments of magnetic and non-magnetiematerialapproximately of equal size, the forward end of eachsegment at its outercircumference projecting beyond the inner circumference and the rear ofthe segment projecting at its inner circumference beyond the planeoccupied by the outer circumference whereby upon operation as a motorthe forward torque caused by the pull of the forward pair of magnetizedpole pieces exceeds the retarding torque of the rear pair of polepieces.

10. In a rotary magnetic induction machine, an electro-magnetic statorhaving a common central or field portion, a coil of insulated conductorwire for magnetizing the same, a plurality of pairs of pole piecesprojecting from the central portion each forming separate incompletecircuits for the flow of magnetic flux, a series of coils of insulatedwire each encircling a pole piece, a rotor having alternate segments ofmagnetic and nonmagnetic material of approximately equal size and formso relatively located one to the otherand to the stator that a constantmagneto-motive force produced on the field portion by a continuousdirect current produces equal magneto-motive force on the pole pieceswhereby an alternating current connected to the coils of the pole pieceswill on the positive side of the wave add to the magneto motive force ofone pair of pole pieces and detract from the magneto-motive force of theadjacent pair thereby drawing a magnetic seg-' ment of the rotor intothe circuit having the I higher magneto-motive force andthe followingnegative wave will reverse conditions again drawing the rotor segmentforward to the adjacent pole pieces which then have the highermagneto-motive force thus increasing the speed of revolution of therotor until it comes into synchronism with the frequency of thealternating current.

11. In a rotary magnetic induction machine, an electro-magnetic statorhaving a central magnetic permeable portion, pole piecesthereon,aseriesof coils of electric con-- ductingrwire at least one for eachpole piece, a rotorreorn'posed of alternate magnetic and non-magneticsegments, acommutator mounted on the rotor comprising two'rings ofconducting material each having alternately proj'ecting segmentsintermeshing with and insulated one from the other, a series of threestationary brushes so positioned-that two of i thebriishes bear on therespective ring portions of the commutator and the third bears V on'theintermeshing segments'of the commu-- tator whereby direct current" n aybe alter a .nately directed to successive coilsofthe pole Ypiecesthereby causing revolution of the rotor. I'n testimony whereof, Isign this specifica tion. -v 1 ELIWHITE.-

